add time command

main.go

@@ -9,8 +9,9 @@ func commandsUsage() string {
 	return fmt.Sprintf(
 		`commands:
   path        %v
+  time        %v
   week        %v
-`, commandPathDescription, commandWeekDescription)
+`, commandPathDescription, commandTimeDescription, commandWeekDescription)
 }
 
 func main() {
@@ -18,6 +19,8 @@ func main() {
 		switch os.Args[1] {
 		case "path":
 			commandPath(os.Args[1:])
+		case "time":
+			commandTime(os.Args[1:])
 		case "week":
 			commandWeek(os.Args[1:])
 		default: